login
A043405
Numbers whose base-7 representation contains exactly one 3.
0
3, 10, 17, 21, 22, 23, 25, 26, 27, 31, 38, 45, 52, 59, 66, 70, 71, 72, 74, 75, 76, 80, 87, 94, 101, 108, 115, 119, 120, 121, 123, 124, 125, 129, 136, 143, 147, 148, 149, 151, 152, 153, 154, 155, 156, 158, 159, 160, 161, 162, 163, 165
OFFSET
1,1
MATHEMATICA
Select[Range[200], DigitCount[#, 7, 3]==1&] (* Vincenzo Librandi, Jul 01 2015 *)
CROSSREFS
Cf. A007093.
Sequence in context: A188396 A356090 A190763 * A296219 A063293 A270997
KEYWORD
nonn,base
STATUS
approved